Mechanical Oil Temperature Gauge;140 - 280 Deg. F;Incl. 6 ft. Tubing; California Residents: WARNING One of the single most important factors in determining how your engine performs (and how long it performs between rebuilds) is proper oil temperature during operation. Knowing your exact temp allows you to make sure You have got the proper oil weight and cooling capacity. Utilizing Auto Meters ultra precise bourdon tube meter movement, you can be assured of the most accurate possible readings of the life blood of your engine. A 6 foot capillary tube and 1/2 inch NPT mounting nut are included.